[FFmpeg-cvslog] avformat/oggdec: Check ffio_ensure_seekback()

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Wed May 22 06:48:48 2024 +0200| [b47116be45d9d609ebef520f2a39ea35072a6203] | committer: Andreas Rheinhardt

avformat/oggdec: Check ffio_ensure_seekback()

Fixes Coverity issue #1492327.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b47116be45d9d609ebef520f2a39ea35072a6203
---

 libavformat/oggdec.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c
index 8ea81e5d45..5339fdd32c 100644
--- a/libavformat/oggdec.c
+++ b/libavformat/oggdec.c
@@ -364,7 +364,9 @@ static int ogg_read_page(AVFormatContext *s, int *sid, int probing)
     ffio_init_checksum(bc, ff_crc04C11DB7_update, 0x4fa9b05f);
 
     /* To rewind if checksum is bad/check magic on switches - this is the max packet size */
-    ffio_ensure_seekback(bc, MAX_PAGE_SIZE);
+    ret = ffio_ensure_seekback(bc, MAX_PAGE_SIZE);
+    if (ret < 0)
+        return ret;
     start_pos = avio_tell(bc);
 
     version = avio_r8(bc);